1. Lord Corporation - Leaders In Shock, Vibration, Noise & Motion Control Products from a manufacturer of active noise and vibration control systems for passenger aircraft.Category Science Technology active noise control...... devices and systems to manage mechanical motion and control noise, and products modificationshops turn to hightech passive and active noise-reduction systems http://www.lordcorp.com/

Locations Products Markets Trade Names ... Tradeshows Lord Corporation designs, formulates, manufactures and markets adhesives, polyurethane coatings, electronic adhesives and coatings; devices and systems to manage mechanical motion and control noise, and products and systems utilizing magnetically-responsive (MR) technology. For a fact sheet on Lord Corporation, click here Solutions for a World in Motion NEWS... Balancing Big Fans GCC Dacotah Cement's plant in Rapid City, South Dakota, had been experiencing problems as a result of severe vibration in the draft fan caused by minute particulates. The problems were resolved by Lord Corp. More... World Cement February 2003 Lord Corporation Engine Mount Support (PDF) Derco has taken major steps to ensure we have the right Lord products in stock, ready for immediate customer delivery. More... Derco News Winter 2003 The Leaders of MR Lord is the world’s only manufacturer of commercialized magneto-rheological (MR) fluid.

2. Active Noise Control FAQ Provides answers to common questions about active noise control including a discussion of popular Category Science Technology active noise control...... active noise control FAQ. The FAQ you are now reading discusses active noise control,a novel way of using basic physics to control noise and/or vibration. http://users.erols.com/ruckman/ancfaq.htm

Active Noise Control FAQ Winner of the Acoustical Society of America Science Writing Award Version 2001-02-27 The "FAQ" you are now reading discusses active noise control, a novel way of using basic physics to control noise and/or vibration. What is an FAQ, you say? It's a "Frequently Asked Questions list." The Internet supports thousands of "newsgroups" discussion forums covering every imaginable topic. When certain questions tend to get asked over and over again, it's common to assemble the answers into a list for easy reference. This particular FAQ was written for the newsgroups news:alt.sci.physics.acoustics and news:comp.dsp to serve four purposes: Provide concise, accurate answers to common questions about active noise control. Dispel popular misconceptions about what active noise control can and cannot do. Refer readers to web links, technical references, and other sources of information. Stimulate public interest in acoustics. You can use the links at left to read the FAQ, or you can click here to download the entire FAQ as a text file.

3. Active Noise Control Corporation defines this method of assuaging noise pollution, offering a FAQ, news, organizations and links. Locate product information. active noise control quiets offensive noise by using cancellation techniques, or antisound. http://www.signalsystemscorp.com/ancindex.htm

Active Noise Control quiets offensive noise by using cancellation techniques, or anti-sound. Signal Systems Corporation's mission is to help quiet irritating noises so you can have a more peaceful life. This web site is designed to give the active noise community a common source for information about this technology, its applications and suppliers. Please use the feedback link at the bottom of each page to let us know how we can improve this site. What is active noise control? Check out the ANC FAQ Where is active noise control technology going ? Read our discussion about commercializing ANC technology Feedback

4. Redirection University of Adelaide. Active noise and vibration control group. Current research projects and publications. http://www.mecheng.adelaide.edu.au/anvc/home.html

Hold on You are being redirected to the ANVC homepage You will be redirected immediately

5. NVHmaterials.com - Links Database active noise control FAQ FAQ's, references, and links to other sites involved with active noise control pop (Added 11-Jun-2000 http://www.nvhmaterials.com/nvh/Active_Noise_Control

home about us search tips contact ... email Check out the new NVHmaterials.com discussion board and forums The site has recently undergone a complete overhaul. Please contact Paul Sakion with any comments or changes NVHmaterials.com Top : Active Noise Control NVHmaterials.com - Links Database: Active Noise Control Home Add a Resource Modify a Resource What's New ... Search Links: Active Noise Control FAQ - FAQ's, references, and links to other sites involved with active noise control pop (Added: 11-Jun-2000 Hits: 292 Rating: Votes: 0) Rate It Signal Systems Corporation - We specialize in signal processing, noise reduction and active noise control pop (Added: 1-Sep-2002 Hits: 225 Rating: 2.00 Votes: 1) Rate It pop (Added: 8-Jun-2000 Hits: 252 Rating: Votes: 0) Rate It Active Control AB - Acticut, a high-tech solution for controlling vibrations in turning and other metal-cutting applications (Added: 11-Jun-2000 Hits: 80 Rating: Votes: 0) Rate It DEICON Dynamics and Control - DEICON designs and prototypes custom active noise and vibration solutions. (Added: 27-Aug-2000 Hits: 88 Rating: Votes: 0) Rate It NCT Group Inc.

6. Active Noise Control active noise control One of the less desirable aspects of modern technology has been the generation of unwanted noise. http://www.me.berkeley.edu/active_noise_control.html

Active Noise Control One of the less desirable aspects of modern technology has been the generation of unwanted noise. Noise can be produced by manufacturing machinery, from air and fluid flows, from vibrations transmitted within structures, etc. This noise can reduce an individual's ability to receive acoustic information and induce listening fatigue and/or permanent hearing damage. At Berkeley, researchers are focusing on active means to ameliorate the problems of unwanted noise. Research Areas Control strategies for noise reduction Acoustic tailoring Piezo sensors and actuators Transient wave control Structural/acoustic response prediction Research Facilities Active Noise Control Laboratory Faculty K. Hedrick A. Packard B. Tongue Professors Packard, Hedrick, and Tongue (from left to right) examine the experimental sound box used to test methods for reducing noise. Latest update: June 18, 1996

7. Soundproofing Noise Control Bosco Italia S.p.A. Industrial Sound-proofing Plans, builds and implements noise reduction and active noise control systems. http://www.sound-proofing.net

sound proofing industrial silencers industrial enclosures sound proofing industrial silencers industrial enclosures sound proofing industrial silencers industrial enclosures sound proofing industrial silencers industrial enclosures Bosco Italia S.p.A., certified with ISO 9000, leader in the industrial sound-proofing sector for the past 20 years, plans, builds and implements noise reduction and active noise control systems. Bosco Italia produces industrially specific products for soundproofing. All the elements can be used for cladding walls and ceilings or for building silent cabins, screens and other items. Before carrying out any soundproofing, whether in a working environment of outside it is necessary to be certain that the acoustic results desired will be reached. In order to ensure this scientifically we have created a new system of acoustic planning called: NOISE CONTROL. The system uses calculation models which make it possible to determine the effective noise reduction that a given programme will provide.

8. 3. Applications Of Active Noise Control active noise control FAQ, Version 200102-27. 3. Applications of Active NoiseControl. 3.1 What are some typical applications for active noise control? http://users.erols.com/ruckman/Applications.htm

Active Noise Control FAQ Version 2001-02-27 3. Applications of Active Noise Control 3.1 What are some typical applications for active noise control? The most successful demonstrations of active control have been for controlling noise in enclosed spaces such as ducts, vehicle cabins, exhaust pipes, and headphones. Note, however, that most demonstrations have not yet made the transition into successful commercial products. Another application that has seen some commercial success is active mufflers for industrial engine exhaust stacks. Active control mufflers have seen years of service on commercial compressors, generators, and so forth. As unit prices for active automobile mufflers have fallen in recent years, several automobile manufacturers are now considering active mufflers for future production cars. However, if you ask your local new car dealer about the active muffler option on their latest model, you will likely receive a blank stare: no production automobiles feature active mufflers as of this writing. Large industrial fans have also benefited from active control. Speakers placed around the fan intake or outlet not only reduce low-frequency noise downstream and/or upstream, but they also improve efficiency to such an extent that they pay for themselves within a year or two.

9. Industrial-enclosure, Electronic Boxes, Plastic Boxes Richard Wöhr GmbH Bosco Italia S.p.A plans, builds and implements noise reduction and active noise control systems http://www.industrial-enclosures.com

INDUSTRIAL ENCLOSURES and ELECTRONIC CABINETS STANDARD OR CUSTOMIZED VERSIONS To make it easier for you to find the type of enclosure you are looking for with our great variety of industrial enclosures, we have put together the enclosures in groups according to their usage. Via the buttons on the left you get directly to the respective index pages. In case you don’t find the desired industrial enclosure, please just send us an email, our range of products is stretched constantly. New product lines: Enclosure line ISAG Profile enclosure line PRIOLINE We can deliver more than 500 different types of enclosures with front foils or foil keyboards varnishing / powder coating mecanical processing printing and many more Are you looking for additional products and services all around your enclosures? In co-operation with other companies, we have put together www.Gehaeuse.info where you will find virtually everything on enclosures: Input systems, foil keyboards, front panels, stainless steel keyboards ...

10. Dynamic Directory - Science - Technology - Acoustics, Ultrasound And Vibration - for using smart materials in active noise control. active noise control and noise cancellation solutions for acoustic http://www.maximumedge.com/cgi/dir/index.cgi/Science/Technology/Acoustics%2C_Ult

var AdLoaded = false; var bsid = '18707'; var bsads = '6'; var bsloc = ''; var bswx = 468; var bshx = 60; var bsw = '_top'; var bsb = 'FFFFFF'; var bsf = '000000'; var bsalt = 'off'; MaximumEdge.com Search E-Mail News ... Maps Dynamic Directory Top Science Technology Acoustics, Ultrasound and Vibration :Active Noise Control Description See also: Business: Energy and Environment: Environment: Noise and Vibration Control: Products: Control Frequently Asked Questions about Active Noise Control - Provides answers to common questions about active noise control including a discussion of popular misconceptions about what active noise control can and cannot do. ACTIVE 99 Technical Program - Program of the 1999 international conference on active noise and vibration control. Active Noise Control for Smart Materials - Research results and software tools for using smart materials in active noise control. Active noise control and noise cancellation solutions for acoustic problems brought to you by Signal Systems Corporation. BoscoItalia S.p.A.

11. Active Noise Control Status active noise control works but where is it going? Larry Riddle. Through education,engineers can be trained in the use of active noise control. http://www.signalsystemscorp.com/anc_status.htm

Conferences SSC Publications ANC e-Store SSC Projects Active Control Status ANC FAQ ANC News ANC Organizations Active noise control works - but where is it going? Larry Riddle Many people have heard of active noise control, but with the exception of headphones, few people have experienced its benefits. Why has this happened? The short answer is cost. Unlike over-hyped technologies, active noise control works. The obstacle has been to make active noise control a cost-effective solution to noise problems. This obstacle has been far more difficult than many people expected. When a technology is more expensive than its benefits are generally worth, only a small market exists for the technology. Now, new technologies are usually expensive to start out. Early users of a technology pay a higher price for being first, with a competitive advantage as the benefit. Technology developers gain valuable experience working with early customers. This experience and know-how yields product improvements that provide more economical solutions for future customers. In this way, the technology spirals into wider and wider use, as the cost for implementation falls. So, what happened to active noise control? Why don't we see active noise control technology in our daily lives? The answer lies in the fact that most consumers are reluctant to pay more than 100 to 2000 dollars for noise reduction solutions. This cost range has been difficult to achieve with effective active solutions. The notable exceptions are noise canceling headphones and some dishwashers.

12. Browsing Science Technology Acoustics, Ultrasound And Vibration Active Noise Con for using smart materials in active noise control. active noise control and noise cancellation solutions for acoustic http://www.uksprite.com/search/search/Science/Technology/Acoustics%2C_Ultrasound

/* CSS Menu highlight- By Marc Boussard (marc.boussard@syntegra.fr) Modified by DD for NS4 compatibility Visit http://www.dynamicdrive.com for this script */ var ns4class='' WebSearch Low-cost advertising at UKSprite Join Login @UK.Sprite Home Latest Headlines UK Weather World Weather ... UK Travel Guide Fun TV Guide Lotto e-Greetings Mobile Fun Communicate Email Login Get Free Email Free Text Messages Lifestyle Horoscopes Dating Recipes Health Shop DVD's Books Videos More... Deals Auctions Classified Ads Site Map Browsing: Science Technology Acoustics, Ultrasound and Vibration Active Noise Control Top Science Technology Acoustics, Ultrasound and Vibration Active Noise Control Related Categories: Business: Energy and Environment: Environment: Noise and Vibration Control: Products: Control Frequently Asked Questions about Active Noise Control Provides answers to common questions about active noise control including a discussion of popular misconceptions about what active noise control can and cannot do. http://users.erols.com/ruckman/ancfaq.htm Preview This Site ACTIVE 99 Technical Program Program of the 1999 international conference on active noise and vibration control.

13. Active Control active noise control Active Control eXperts Active Control eXperts (ACX) is a rapidly growing product design and manufacturing company specializing in applying smart materials, such as piezoelectrics, and active control technology. EZANC, from Causal Systems, makes active noise control accessible to engineers, researchers, consultants, and http://www.ecgcorp.com/velav/vldocs/active.html

Active Noise Control Active Control eXperts Active Control eXperts (ACX) is a rapidly growing product design and manufacturing company specializing in applying smart materials, such as piezoelectrics, and active control technology. ACX provides engineering services and components to companies that need actuators, sensors, vibration reduction, and motion control in their products. Causal Systems EZ-ANC II is a product released in 2000 that has a Windows graphical user interface. It is based on the Analog Devices floating point Sharc processor, has 10 inputs and 10 outputs, is suitable for random and periodic noise control, and is supplied in an enclosure with power supply. Lord Corporation Lord Corporation's NVX Active Systems solve a range of vibration, motion and noise control challenges. Typical systems feature a controller, actuators and sensors which work together to eliminate unwanted vibration and noise or to produce precise forces or motions, depending on the application. NCT Group, Inc. NCT is a leading technology company dedicated to the development and commercialization of Active Wave Management applicationsthe electronic manipulation of sound and signal waves to reduce noise, improve signal-to-noise ratios and enhance sound quality. QRDC, Inc.

14. NVHmaterials.com - Links Database 19 Cool Links active noise control The Active Noise Vibration ControlGroup pop (Added 8Jun-2000 Hits 252 Rating 0 Votes 0) Rate It. http://www.nvhmaterials.com/nvh/Cool/

home about us search tips contact ... email Check out the new NVHmaterials.com discussion board and forums The site has recently undergone a complete overhaul. Please contact Paul Sakion with any comments or changes NVHmaterials.com Top : Cool NVHmaterials.com - Links Database: What's Cool - The Top 3%! Home Add a Resource Modify a Resource What's New ... Search 19 Cool Links: Active Noise Control pop (Added: 8-Jun-2000 Hits: 252 Rating: Votes: 0) Rate It Active Noise Control FAQ - FAQ's, references, and links to other sites involved with active noise control pop (Added: 11-Jun-2000 Hits: 292 Rating: Votes: 0) Rate It Signal Systems Corporation - We specialize in signal processing, noise reduction and active noise control pop (Added: 1-Sep-2002 Hits: 225 Rating: 2.00 Votes: 1) Rate It Informative Websites on Noise and Vibration Multi-Science pop (Added: 5-Jul-2000 Hits: 200 Rating: 9.10 Votes: 10) Rate It pop (Added: 3-Sep-2000 Hits: 150 Rating: Votes: 0) Rate It acoustics.eu.com

15. Active Noise Control, The System With More Error Sensors And Sources Content. active noise control, the system with more error sensors and sources.Miroslav Luke¹ 1. 22 November 2001. active noise control, how does it work? http://www.electronicsletters.com/papers/2002/0004/paper.asp

Paper: # 1/4/2002 ISSN 1213-161X Content Active noise control, the system with more error sensors and sources Miroslav Luke¹ 22 November 2001 Abstract: This paper deals with the expansion of active noise control systems into a three-dimensional domain. More then one error microphone and speaker is used in order to eliminate an ''unwanted'' disturbance. Three algorithms are described. Multiple Error Least Mean Squares (ME-LMS) algorithm is based upon the minimizing of the mean value of all squares of error signals. Minimax algorithm does almost the same except for not minimizing all squares but only the maximal square of an error signal. Complex Sign Algorithm (CSA) is algorithm in which an error signal is normalized for its absolute value so that a recursion is driven by the sign of an error signal. Simulation of these three algorithms are proved in Matlab. Content: 1. Introduction 2. Theoretical analysis 2.1 System model 2.2 Algorithm derivation ... Bibliography 1. Introduction In recent years a classical noise protectors have been complemented with new systems called active noise control system. Active noise control systems are suitable for lower frequencies and classical mechanical noise protectors are used for higher frequencies. So, these two systems, the old and the new one, functioning together can cover very wide frequency band beginning almost at Hz. Active noise control, how does it work? This question may be simply answered by following sentence. An active noise control system measures an input acoustic signal and on the base of this measurement creates another acoustic signal, which is able to cancel the unwanted part of the input signal in the sum of these two acoustic signals.

16. Siemens VDO Automotive AG press Vienna, 25 April 2002 Music under the hood active noise control from SiemensVDO Exploits the Latest Findings of Psychoacoustics Research In extensive http://www.siemensvdo.com/news/2002/04002e.htm

Press Releases Press Archive 2002 Press Archive 2001 Press Contacts For the trade press Vienna, 25 April 2002 Music under the hood: Active Noise Control from Siemens VDO Exploits the Latest Findings of Psychoacoustics Research In extensive tests, Siemens VDO Automotive has proved that an active control of the engine sound significantly influences the driver's feeling of well-being. At the 23rd International Vienna Motor Symposium, the automotive electronics supplier is showing how selective sound design is made possible with Active Noise Control. What sounds put the motorist to sleep? What sequences of tones increase a person's feeling of well-being? These are typical questions for psychoacoustics, a relatively new scientific discipline whose findings are increasingly falling on open ears in automobile development. Fundamental studies have shown, for example, that a low but constant sound level is by no means always regarded positively. In fact motorists make similarly high demands on the sound of a good engine as they do when listening to a symphony: Harmonious sequences of tones are particularly popular. But since even the most perfect mechanical design of an engine cannot always rule out dissonance, Siemens VDO has developed a technology that allows the engine sound to be actively influenced - at its source. With Active Noise Control (ANC), the opposing noise is generated by a loudspeaker installed in the air intake system. Here the engineers at Siemens VDO utilize the physical phenomenon of interference: When two waves meet, their amplitudes are superimposed on one another. If these waves are sound waves, a new tone is generated with a different volume. In extreme cases, the waves cancel one another out completely - and there is silence.

17. Innovation News Novemeber 2002 Engineers at Siemens VDO Automotive have come up with active noise control (ANC),a patented technology that allows engine sounds to be actively influenced at http://w4.siemens.de/en2/html/press/innovation_news/2002/ie_11_02.html

November 2002 Download / Print as pdf-file (Html-Layout) Getting There with Augmented Reality A system that simplifies automotive navigation. Contact: johannes.winterhagen@siemens.com A graphic processor projects navigation information (yellow) onto a video image of the road. For more information on: Original press release, click: http://www.siemensvdo.com/news/2002/... Siemens VDO, click: http://www.siemensvdo.com/... US Council for Automotive Research, click: http://www.uscar.org/index.htm... Image available; click for a 300 dpi photo Coming Soon: Cars with Sound Personalities A significant improvement in vehicle acoustic performance. Contact: david.ladd@siemens.com or johannes.winterhagen@siemens.com The Active Noise Control unit (center right) can shape or cancel engine noise. For more information on: Original press release, click:

18. Active Noise Control FAQ V1996-03-14 active noise control FAQ v199603-14. This FAQ has four purposes * Provide concise,accurate answers to common questions about active noise control. http://isc.faqs.org/faqs/active-noise-control-faq/

Active Noise Control FAQ v1996-03-14 From: ruckman@xis.com (Dr. Chris Ruckman) Newsgroups: alt.sci.physics.acoustics comp.dsp alt.answers comp.answers ... news.answers Subject: Active Noise Control FAQ v1996-03-14 Followup-To: alt.sci.physics.acoustics 4iail7$jse@news2.cais.com ruckman@xis.com (Dr. Chris Ruckman) Summary: This FAQ describes active noise control, a novel method for controlling unwanted sound and vibration. X-Newsreader: News Xpress 2.0 Beta #0 Keyword: active control, noise, vibration, sound, anti-noise, cancellation, FAQ Archive-name: active-noise-control-faq Posting-Frequency: monthly Last-modified: 1996/02/22 Version: 1996-03-14 - Frequently Asked Questions: Active noise control - SUMMARY: The FAQ you are now reading discusses active noise control, a novel way of using basic physics to control noise and/or vibration. What is an FAQ, you say? Well, the Internet supports thousands of "newsgroups" discussion forums covering every imaginable topic. An FAQ (Frequently Asked Questions list) is a summary written to answer specific questions that arise repeatedly in the newsgroups. This particular FAQ was written for the newsgroups news:alt.sci.physics.acoustics

19. Publications On Active Noise And Vibration Control -- Scott C. Douglas active noise control, and its cousin, active vibration control, attempt to cancelan unwanted ``noise'' acoustical wave by injecting an equalbut-opposite http://engr.smu.edu/~douglas/pubanvc.html

Active Noise and Vibration Control (ANVC) Active noise control, and its cousin, active vibration control, attempt to cancel an unwanted ``noise'' acoustical wave by injecting an equal-but-opposite ``anti-noise''acoustical wave into the medium, thereby attenuating the wave via destructive interference. The origins of ANVC date back to at least 1936, when P. Leug patented the idea for sound control. It tooks nearly fifty years, however, to obtain what might be called successful ANVC, due to the level of electronic precision required to create an anti-noise signal with any great fidelity. Today, anti-noise headsets abound (I have a very cute set of Sony earbud-style `phones from Japan); these are mostly analog systems. Large-scale quieting requires the use of adaptive digital signal processing technology in all but the simplest acoustic environments. I began my study of ANVC as a summer hire at SRI International, Menlo Park, CA, in 1992. While working in the Acoustics and Radar Technology Laboratory, I helped develop the algorithms and guide software code developers to implement a simple one-input, one-output, one-error active noise control system that illustrated some of the advantages that simple adaptive processing has over more-costly off-line calibration methods. I also developed the multichannel extensions of the algorithms and wrote an internal SRI report that helped others to design a real-time multichannel active noise control system for reverberant room noise control. After joining the University of Utah, I remained as a consultant to SRI, developing normalized LMS algorithms for multichannel active noise control and studying simplified

20. Institute Of Noise Control Engineering USA One hundred and sixtyfive papers on all aspects of noise control engineering, includingair-moving device noise control, active noise control, and European http://www.inceusa.org/pronatlconf.asp

INCE USA International INCE INCE Foundation Conferences ... Technical Activities Institute of Noise Control Engineering Iowa State University College of Engineering 212 Marston Hall Ames, IA 50011-2353 Phone: (515) 294-6142 Fax: (515) 294-3528 E-mail: ibo@inceusa.org The NOISE-CON Series of National Conferences on Noise Control Engineering The NOISE-CON Series of conferences on Noise Control Engineering have been held in the United States since 1973. The conferences were held in the odd-numbered years until 1987. Beginning with NOISE-CON 88, the conferences will be held every two years out of three. The next NOISE-CON conference is scheduled for 1997. All of the Proceedings in the NOISE-CON Series are available for immediate shipment except the NOISE- CON 79 Proceedings. An order form and price list are located here A link has been established from each description of the Proceedings to its Table of Contents (where the TOC is available).

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